Caps For 500 Ml/1 L Media-Lab Bottles. Pyrex borosilicate glass bottles, complete with cushioned PTFE-lined thermoplastic polyester cap and pouring ring, resistant to temperature and chemical attack. Suitable for bottling concentrated nitric acid for long-term storage. See CLEAPSS' guides GL251 GL252 for more information.• White graduations marking spot• Withstands up to 180 °C hot air sterilisation• Complies with ISO 4796
